JPH0514806B2 - - Google Patents
Info
- Publication number
- JPH0514806B2 JPH0514806B2 JP62282740A JP28274087A JPH0514806B2 JP H0514806 B2 JPH0514806 B2 JP H0514806B2 JP 62282740 A JP62282740 A JP 62282740A JP 28274087 A JP28274087 A JP 28274087A JP H0514806 B2 JPH0514806 B2 JP H0514806B2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- cylindrical
- resin material
- resin
- weld line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920005989 resin Polymers 0.000 claims description 38
- 239000011347 resin Substances 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 241001247986 Calotropis procera Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Vehicle Body Suspensions (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は、自動車におけるエンジンの車体に対
する過大な変位を規制するバツフアーロツドや或
いはサスペンシヨンロツド等として好適に用いら
れる樹脂製連結ロツドの製造方法に係り、特に荷
重強度の向上によつて、その樹脂化を有利に達成
せしめ得る技術に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for manufacturing a resin connecting rod that is suitably used as a buffer rod or suspension rod for regulating excessive displacement of an engine relative to a vehicle body in an automobile. In particular, it relates to a technique that can advantageously achieve resinization by improving load strength.
（従来技術）
横置型自動車エンジンにおいて、エンジンの車
体に対する過大な変位を規制するバツフアーロツ
ドや、或いは自動車のサスペンシヨンに用いられ
るリンクやロツド等の如く、所定の取付部材間に
介装されて、主として軸方向の引張乃至は圧縮荷
重が作用せしめられる連結ロツドにあつては、一
般に、長手状ロツド部の軸方向両端部において、
略平行な軸心をもつて形成された二つの筒状部が
一体的に設けられてなる構造とされ、それぞれの
筒状部内に配されるゴムブツシユを介して、相互
に連結されるべき所定の取付部材間に取り付けら
れて介装せしめられることにより、それらの取付
部材を弾性的に連結するようになつている。(Prior art) In a horizontally mounted automobile engine, a buffer rod that restricts excessive displacement of the engine with respect to the vehicle body, or a link or rod used in an automobile suspension, etc., is interposed between predetermined mounting members and is mainly used. In the case of a connecting rod to which an axial tensile or compressive load is applied, generally, at both axial ends of the longitudinal rod part,
It has a structure in which two cylindrical parts formed with substantially parallel axes are integrally provided, and a predetermined number of parts to be connected to each other is provided through rubber bushings arranged inside each cylindrical part. By being attached and interposed between the attachment members, the attachment members are elastically connected.
ところで、このような連結ロツドは、従来、金
属材料にて形成されていたが、近年、車両の軽量
化や耐腐食性の向上等を図るべく、樹脂材料にて
形成することが考えられている。そして、このよ
うに連結ロツドを樹脂製とすれば、車両の軽量化
や耐腐食性の向上が図れることは勿論、樹脂の有
する制振性の点から振動抑制効果も期待できるの
であり、更にはその筒状部内へのゴムブツシユの
挿入、配設を、連結ロツドの成形と同時に行なう
ことが可能となることから、生産性の向上をも期
待することができるのである。 Incidentally, such connecting rods have traditionally been made of metal materials, but in recent years, in order to reduce the weight of vehicles and improve their corrosion resistance, it has been considered that they may be made of resin materials. . If the connecting rod is made of resin in this way, it is possible to reduce the weight of the vehicle and improve its corrosion resistance, and it can also be expected to have a vibration suppressing effect due to the vibration damping properties of the resin. Since it becomes possible to insert and arrange the rubber bushing into the cylindrical portion at the same time as molding the connecting rod, it is also possible to expect an improvement in productivity.
ところが、このような連結ロツドの樹脂化に際
しては、荷重強度の確保が難しく、特に、両側筒
状部における、ロツド部軸方向の最外側位置付近
において、強度が不足して破壊が生じ易いため
に、その実用化に問題があつたのである。 However, when using resin for such connecting rods, it is difficult to ensure sufficient load strength, especially in the vicinity of the outermost position in the axial direction of the rod part in the cylindrical parts on both sides. However, there were problems in its practical application.
（解決課題）
ここにおいて、本発明は、上述の如き事情を背
景として為されたものであつて、その解決課題と
するところは、筒状部における、ロツド部軸方向
の最外側位置付近の強度を向上させるため、通常
かかる筒状部の最外側位置付近に発生するウエル
ドラインを、容易に周方向にずらせることのでき
る樹脂製連結ロツドの製造方法を提供することに
ある。(Problem to be solved) Here, the present invention has been made against the background of the above-mentioned circumstances, and the problem to be solved is to increase the strength of the rod portion in the vicinity of the outermost position in the axial direction of the cylindrical portion. In order to improve this, it is an object of the present invention to provide a method for manufacturing a resin connecting rod that can easily shift the weld line that normally occurs near the outermost position of the cylindrical portion in the circumferential direction.
（解決手段）
そして、かかる課題を解決するために、本発明
にあつては、長手状ロツド部の軸方向両端部にお
いて、略平行な軸心をもつて形成された二つの筒
状部を一体的に有し、それぞれの筒状部内に配さ
れるゴムブツシユを介して、相互に連結されるべ
き所定の取付部材にそれぞれ取り付けられること
により、それらの取付部材を弾性的に連結せしめ
る連結ロツドを、所定の樹脂材料の射出成形操作
によつて製造するに際して、前記ロツド部の成形
キヤビテイを、その長手方向両端部に設けられる
前記二つの筒状部の成形キヤビテイにおける両軸
心を含む平面を挟んで両側に位置する部分が相互
に異なる面積を与える軸直角方向の断面形状をも
つて形成し、前記樹脂材料を、かかるロツド部の
成形キヤビテイを通じて、前記筒状部の成形キヤ
ビテイに導くことにより、該筒状部に形成される
ウエルドラインを、該筒状部の最外側位置から周
方向にずらせる樹脂製連結ロツドの製造方法を、
その特徴とするものである。(Solution Means) In order to solve this problem, in the present invention, two cylindrical parts formed with substantially parallel axes are integrated at both ends of the longitudinal rod part in the axial direction. a connecting rod which is attached to predetermined attachment members to be interconnected through rubber bushings disposed within the respective cylindrical portions, thereby elastically connecting the attachment members; When manufacturing by injection molding operation of a predetermined resin material, the molding cavity of the rod part is sandwiched between a plane containing both axes of the molding cavities of the two cylindrical parts provided at both ends in the longitudinal direction. The resin material is formed by forming the resin material into the molding cavity of the cylindrical part through the molding cavity of the rod part, by forming the resin material into the molding cavity of the tubular part through the molding cavity of the rod part. A method for manufacturing a resin connecting rod in which a weld line formed in a cylindrical part is shifted in the circumferential direction from the outermost position of the cylindrical part,
This is its characteristic.
（実施例）
以下、本発明を更に具体的に明らかにするため
に、本発明の実施例について、図面を参照しつ
つ、詳細に説明することとする。(Examples) Hereinafter, in order to clarify the present invention more specifically, examples of the present invention will be described in detail with reference to the drawings.
先ず、第１図及び第２図には、エンジンユニツ
トと車体フレームとの間に介装され、それらを連
結せしめることにより、該エンジンユニツトの車
体に対する過大な変位を規制するバツフアーロツ
ドであつて、本発明に従う製造方法によつて製造
されたものの一例が示されている。 First, FIGS. 1 and 2 show a buffer rod which is interposed between an engine unit and a vehicle body frame and which restricts excessive displacement of the engine unit with respect to the vehicle body by connecting them. An example of what is manufactured by the manufacturing method according to the invention is shown.
かかるバツフアーロツド１０にあつては、長手
形状を呈するロツド部１２と、該ロツド部１２の
軸方向両端部において、それぞれ、互いに平行な
軸心をもつて一体的に形成された筒状部１４，１
６とから構成されている。 This buffer rod 10 includes a rod portion 12 having a longitudinal shape, and cylindrical portions 14, 1 integrally formed at both axial ends of the rod portion 12 with axes parallel to each other.
It consists of 6.
そして、かかるロツド部１２は、第３図に断面
図が示されているように、板状部１８の両面上の
幅方向両側縁部及び中央部に、それぞれ、長手方
向全長に亘つて延びる側縁補強リブ２０，２２及
び中央補強リブ２４が、一体的に突出形成されて
いる略王字型断面形状をもつて形成されている。
なお、かかるロツド部１２の長手方向中央部に
は、幅方向に延びて、それら側縁及び中央の補強
リブ２０，２２及び２４を相互に連結する連結リ
ブ２６が設けられている。 As shown in the cross-sectional view of FIG. 3, the rod portion 12 has sides extending over the entire length in the longitudinal direction at both edges in the width direction and the center portion on both sides of the plate-like portion 18. The edge reinforcing ribs 20, 22 and the center reinforcing rib 24 are integrally formed with a protruding substantially king-shaped cross-sectional shape.
A connecting rib 26 is provided at the longitudinal center of the rod portion 12, extending in the width direction and interconnecting the side edges and the central reinforcing ribs 20, 22, and 24.
また、このようなロツド部１２の軸方向両端部
に形成された筒状部１４，１６にあつては、異な
る内径を有する円筒形状をもつて、小径筒状部１
４と大径筒状部１６として形成されている。 Further, the cylindrical portions 14 and 16 formed at both ends of the rod portion 12 in the axial direction have cylindrical shapes having different inner diameters, so that the small diameter cylindrical portion 1
4 and a large diameter cylindrical portion 16.
ところで、このようなバツフアーロツド１０
は、金型にて形成される成形キヤビテイ内に、所
定の樹脂材料を射出操作によつて充填せしめるこ
とにより、即ち通常の樹脂材料の射出成形手法に
従つて成形され、それによつて一体的な樹脂製部
材として形成される。なお、かかる樹脂材料とし
ては、熱可塑性樹脂及び熱硬化性樹脂が何れも採
用可能であるが、特に、各部の機械的強度を確保
する上から、ガラス繊維や炭素繊維、芳香族ポリ
アミド（ケブラー）繊維等の繊維補強材などが配
合された強化材配合樹脂が好適に用いられること
となる。 By the way, there are 10 buffer rods like this.
is formed by filling a molding cavity formed in a mold with a predetermined resin material by an injection operation, that is, in accordance with a normal injection molding method for resin materials, thereby forming an integral body. It is formed as a resin member. As the resin material, both thermoplastic resins and thermosetting resins can be used, but in particular, from the viewpoint of ensuring the mechanical strength of each part, glass fibers, carbon fibers, aromatic polyamides (Kevlar), etc. A reinforcing material-containing resin containing a fiber reinforcing material such as fiber is preferably used.
ここにおいて、上記バツフアーロツド１０は、
そのロツド部１２における、成形時の樹脂材料の
注入口としてのゲート部が設けられることとなる
側の側縁補強リブ２０の肉厚：t1が、他方の側縁
補強リブ２２の肉厚：t2に比して、所定寸法厚肉
とされており（第３図参照）、それによつて該ロ
ツド部１２の軸直角方向断面を、二つの筒状部１
４，１６の軸心を含む平面：ｘ−ｘ（第１図及び
第３図参照）にて分断した際、該平面：ｘ−ｘを
挟んで両側に位置する二つの断面部分において、
異なる断面積が設定されている。 Here, the buffer rod 10 is
In the rod portion 12, the wall thickness of the side edge reinforcing rib 20 on the side where the gate portion as the injection port for the resin material during molding will be provided is t1 , and the wall thickness of the other side edge reinforcing rib 22 is: The rod portion 12 is thicker by a predetermined dimension than the rod portion 12 (see Fig. 3), so that the cross section of the rod portion 12 in the direction perpendicular to the axis is divided into the two cylindrical portions 1.
When divided at the plane containing the axes of 4 and 16: x-x (see Figures 1 and 3), in the two cross-sectional parts located on both sides of the plane: x-x,
Different cross-sectional areas are set.
すなわち、このような断面形状が設定されたロ
ツド部１２にあつては、その成形に際して、通
常、該ロツド部１２の長手方向中央位置：Ａ（第
１図参照）に設定されることとなる金型のゲート
部を通じて、成形キヤビテイ内に注入される樹脂
材料の流動量が、ロツド部１２における、前記二
つの筒状部１４，１６の軸心を含む平面：ｘ−ｘ
を挟んだ両側において異ならしめられることとな
る。そして、それ故ロツド部１２の成形キヤビテ
イを通じて筒状部１４，１６の成形キヤビテイ内
に注入される樹脂材料にあつては、かかるロツド
部１２の成形キヤビテイに連結された部位から、
周方向両方向に分流されて充填されることとなる
が、かかる分流中央点が、ロツド部１２の長手方
向端部と前記平面：ｘ−ｘとの交点付近とされる
ことから、それぞれの筒状部１４，１６の成形キ
ヤビテイにおける樹脂材料の周方向両方向の分流
速度が、互いに異ならしめられることとなる。よ
り具体的には、それぞれの筒状部１４，１６の成
形キヤビテイにおいて、前記平面：ｘ−ｘを挟ん
で、ロツド部１２に厚肉の側縁補強リブ２０が形
成される側における周方向の樹脂材料の分流速度
が、他方の周方向の樹脂材料の分流速度よりも、
ロツド部１２の成形キヤビテイを通じて導かれる
樹脂材料の流動量が多いことによつて、大きく設
定されることとなるのである。 That is, in the case of the rod part 12 having such a cross-sectional shape, when molding the rod part 12, the metal which is usually set at the longitudinal center position of the rod part 12: A (see FIG. 1) is The flow rate of the resin material injected into the molding cavity through the gate part of the mold is determined by the plane including the axes of the two cylindrical parts 14 and 16 in the rod part 12: x-x
It will be different on both sides. Therefore, when the resin material is injected into the mold cavities of the cylindrical parts 14 and 16 through the mold cavity of the rod part 12, from the part connected to the mold cavity of the rod part 12,
The flow is split in both directions in the circumferential direction and filled, but since the center point of the split flow is near the intersection of the longitudinal end of the rod portion 12 and the plane: x-x, each cylindrical The branching speeds of the resin material in both circumferential directions in the molded cavities of the parts 14 and 16 are made to be different from each other. More specifically, in the molded cavities of the respective cylindrical parts 14 and 16, the circumferential direction on the side where the thick side edge reinforcing ribs 20 are formed on the rod part 12 across the plane: x-x. The splitting speed of the resin material is higher than the splitting speed of the other resin material in the circumferential direction.
It is set large because the flow rate of the resin material guided through the molded cavity of the rod portion 12 is large.
また、それによつて、かかる筒状部１４，１６
の成形キヤビテイにおける、樹脂材料の周方向両
方向からの注入速度の違いから、それぞれの筒状
部１４，１６の成形キヤビテイの周上における注
入樹脂材料の合流点、即ちウエルドラインが、成
形品たる前述の如きバツフアーロツド１０におけ
る筒状部１４，１６の周方向中間位置、即ち前記
ロツド部１２の軸方向における最外側位置より
も、薄肉の側縁補強リブ２２側の周方向に所定寸
法ずれた位置（第１図中、O1P1及びO2P2上）に
おいて生ぜしめられるのである。 Also, thereby, such cylindrical portions 14, 16
Due to the difference in the injection speed of the resin material from both directions in the circumferential direction in the molding cavity, the confluence point of the injected resin material on the circumference of the molding cavity of each cylindrical part 14, 16, that is, the weld line, A position shifted by a predetermined distance in the circumferential direction on the thin side edge reinforcing rib 22 side from the circumferential intermediate position of the cylindrical parts 14 and 16 in the buffer rod 10, that is, the outermost position in the axial direction of the rod part 12 ( In FIG. 1, O 1 P 1 and O 2 P 2 (upper) are generated.
そして、このような構造とされたバツフアーロ
ツド１０は、図示はされていないが、良く知られ
ているように、その小径筒部１４及び大径筒部１
６に対して、それぞれ、中央部内周面に軸金具が
一体的に固着された円筒形状のゴム弾性体からな
るゴムブツシユが、圧入等によつて配設せしめら
れ、かかる小径筒部１４側に配されたゴムブツシ
ユにおける軸金具にて車体フレーム側に取り付け
られる一方、大径筒部１６側に配されたゴムブツ
シユにおける軸金具にてエンジンユニツト側に取
り付けられることにより、それらエンジンユニツ
トと車体との間に介装せしめられることとなる。 Although not shown in the drawings, the buffer rod 10 having such a structure has a small diameter cylindrical portion 14 and a large diameter cylindrical portion 1, as is well known.
6, a rubber bush made of a cylindrical rubber elastic body with a shaft fitting integrally fixed to the inner circumferential surface of the central part is arranged by press-fitting or the like, and is arranged on the small diameter cylindrical part 14 side. It is attached to the vehicle body frame side with the shaft fitting of the rubber bushing arranged on the large diameter cylindrical part 16 side, and is attached to the engine unit side with the shaft fitting of the rubber bushing arranged on the large diameter cylindrical part 16 side, so that there is no space between the engine unit and the vehicle body. He was forced to undergo medical intervention.
ところで、上述の如くして製造されたバツフア
ーロツド１０にあつては、主として軸方向荷重、
なかでも引張荷重が作用せしめられることとなる
が、本発明者らが、かかる引張荷重作用時におけ
る応力分布を測定したところ、このようなバツフ
アーロツド１０の両側筒状部１４，１６における
引張荷重作用時の応力度は、従来のバツフアーロ
ツドにおけるウエルドラインの発生位置たる、ロ
ツド部１２の軸方向最外側位置、即ちバツフアー
ロツド１０における軸方向両側の最外側位置にお
いて、最も大きな値を示し、且つ該最外側位置を
中心として、その両側に、それぞれ略45度乃至は
135度の中心角をもつて変位した部位、換言すれ
ばロツド部１２の軸心線に対する、筒状部１４，
１６の軸心とその周上の点とを結ぶ直線の交角
（第１図中、α及びβ）が、略45度または135度と
なる部位に、それぞれ、応力度が０となる位置が
存在することが明らかとなつた。 By the way, the buffer rod 10 manufactured as described above mainly suffers from axial loads,
Among them, a tensile load is applied, and when the present inventors measured the stress distribution when such a tensile load was applied, it was found that when such a tensile load was applied on both side cylindrical parts 14 and 16 of the buffer rod 10. The stress degree shows the largest value at the outermost position in the axial direction of the rod portion 12, which is the position where the weld line occurs in the conventional buffer rod, that is, at the outermost position on both sides of the buffer rod 10 in the axial direction, and at the outermost position. around 45 degrees or so on both sides of the center.
The cylindrical portion 14 is displaced at a center angle of 135 degrees, in other words, the cylindrical portion 14 is displaced with respect to the axis of the rod portion 12.
There are positions where the stress level is 0 at the locations where the intersection angles (α and β in Figure 1) of the straight lines connecting the 16 axes and points on the circumference are approximately 45 degrees or 135 degrees, respectively. It became clear that
従つて、上述の如き製造方法により、小径筒状
部１４及び大径筒状部１６におけるウエルドライ
ンの発生位置を、筒状部１４，１６の最外側位置
から周方向に所定寸法ずらせたバツフアーロツド
１０にあつては、その荷重強度が有効に向上せし
められ得るのである。 Therefore, by using the manufacturing method described above, the buffer rod 10 is manufactured in which the positions of the weld lines in the small diameter cylindrical part 14 and the large diameter cylindrical part 16 are shifted by a predetermined distance in the circumferential direction from the outermost positions of the cylindrical parts 14 and 16. In this case, the load strength can be effectively improved.
そして、特に、上述の如き製造方法に従えば、
ロツド部１２における一方の側縁補強リブ２０と
他方の側縁補強リブ２２との肉厚の差を変更する
こと等によつて、ウエルドラインの発生位置を、
容易に調節することが可能であることから、ウエ
ルドラインを、応力度の小さな部位に設定するこ
とによつて、該ウエルドラインによる耐荷重強度
の低下が効果的に回避され、樹脂本来の強度が有
効に発揮され得ることとなるのである。 In particular, if the manufacturing method as described above is followed,
By changing the difference in wall thickness between one side edge reinforcing rib 20 and the other side edge reinforcing rib 22 in the rod portion 12, the position of the weld line can be adjusted.
Since it is possible to easily adjust the weld line, by setting the weld line in an area with low stress, a reduction in load-bearing strength due to the weld line can be effectively avoided, and the original strength of the resin can be improved. This means that they can be used effectively.
なお、ここにおいて、かかるウエルドラインを
ずらせる具体的寸法としては、好ましくは、ロツ
ド部１２の軸心線に対する、それぞれの筒状部１
４，１６の軸心とウエルドラインとを結ぶ直線
（O1P1，O2P2）との交角：α，βが、それぞれ、
20度〜160度程度、特には、30度〜60度または110
度〜150度程度が望ましく、一般には、かかるα
及びβが、それぞれ、略45度を目標として設定さ
れることとなる。 Here, the specific dimension for shifting the weld line is preferably the distance between each cylindrical part 1 with respect to the axis of the rod part 12.
The angles of intersection with the straight lines (O 1 P 1 , O 2 P 2 ) connecting the axes of 4 and 16 and the weld line: α and β are, respectively,
About 20 degrees to 160 degrees, especially 30 degrees to 60 degrees or 110 degrees
degree to about 150 degrees is desirable, and in general, such α
and β are each set with a target of approximately 45 degrees.
すなわち、上述の如き製造方法に従えば、通
常、このようなバツフアーロツドに及ぼされる
1500Kg程度の引張荷重に対して充分に耐え得るだ
けの荷重強度を有するバツフアーロツドを容易に
製造することができるのであり、それによつてバ
ツフアーロツドの樹脂化が有利に達成せしめられ
得ることとなるのである。 That is, if the manufacturing method as described above is followed, normally such buffer rods will be
A buffer rod having a load strength sufficient to withstand a tensile load of about 1500 kg can be easily manufactured, and thereby the buffer rod can be advantageously made of resin.
また、それによつて、前述のことき、軽量化及
び耐腐食性の向上等の、ロツドの樹脂化による優
れた効果が有効に奏せしめられ得るのであり、ま
た、従来、圧入及び絞り加工等によつて行なつて
いた、該バツフアーロツド１０の筒状部１４，１
６内へのゴムブツシユの配設を、かかるバツフア
ーロツド１０の成形キヤビテイ内にゴムブツシユ
を配置せしめた状態下で、該成形キヤビテイ内に
所定の樹脂材料を充填することにより、該バツフ
アーロツド１０の成形と同時に行なうことが可能
となり、製造性が極めて有利に向上され得るとい
つた優れた効果をも発揮され得るのである。 In addition, as mentioned above, the excellent effects of resin rods, such as weight reduction and improved corrosion resistance, can be effectively achieved. The cylindrical portion 14, 1 of the buffer rod 10, which had been
The rubber bushing is placed in the buffer rod 10 at the same time as the buffer rod 10 is molded by filling the molding cavity with a predetermined resin material while the rubber bushing is placed in the molding cavity of the buffer rod 10. This makes it possible to achieve excellent effects such as extremely advantageous improvement in productivity.
ところで、上述の如きバツフアーロツド１０に
おいて、大径筒状部１６と小径筒状部１４との径
の差が著しい場合には、小径筒状部１４に比し
て、大径筒状部１６側におけるウエルドラインの
ずれ角度（交角：β）が小さくなり易い。 By the way, in the buffer rod 10 as described above, if there is a significant difference in diameter between the large diameter cylindrical part 16 and the small diameter cylindrical part 14, the diameter on the large diameter cylindrical part 16 side is larger than that of the small diameter cylindrical part 14. The deviation angle (intersection angle: β) of the weld line tends to become small.
そこで、そのような場合には、ロツド部１２に
おける樹脂材料の注入位置、即ち金型のゲート部
位置を、該ロツド部１２の長手方向において、大
径筒状部１６側に所定寸法偏倚した位置：Ｂ（第
１図参照）に設定することが望ましい。このよう
なゲート部の位置の変更（偏倚寸法：ｌ）によつ
ても、筒状部１４，１６におけるウエルドライン
の発生位置を調節することができることは、本発
明者らによつて確認されているところである。 Therefore, in such a case, the injection position of the resin material in the rod part 12, that is, the position of the gate part of the mold, is shifted by a predetermined dimension toward the large diameter cylindrical part 16 in the longitudinal direction of the rod part 12. :B (see Figure 1) is desirable. The present inventors have confirmed that the position of the weld line in the cylindrical parts 14 and 16 can be adjusted by changing the position of the gate part (deviation dimension: l). This is where I am.
また、かかる金型のゲート部は、必ずしもロツ
ド部１２に設定する必要はなく、第４図に示され
ているように、小径筒状部１４乃至は大径筒状部
１６の何れか一方の周上にゲート部：Ｃを設定す
ることによつても、該筒状部１４乃至は１６に生
ずるウエルドラインを、その最外側部位よりも所
定寸法、周方向にずらせることが可能である。な
お、かかる手法においては、ウエルドラインは、
ゲート部が設けられた側とは反対側の筒状部１４
乃至は１６側にのみ生じることとなる。 Further, the gate part of such a mold does not necessarily have to be set in the rod part 12, but as shown in FIG. By setting the gate portion C on the circumference, it is also possible to shift the weld line generated in the cylindrical portions 14 to 16 by a predetermined dimension from the outermost portion thereof in the circumferential direction. In addition, in this method, the weld line is
Cylindrical portion 14 on the opposite side to the side where the gate portion is provided
Otherwise, it will occur only on the 16th side.
ところで、このように一方の筒状部、例えば大
径筒状部１６にゲート部：Ｃを設定する場合、他
方の小径筒状部１４に生じるウエルドラインの位
置が、前述の如く、最外側部位よりも所定寸法だ
けずれるように、ロツド部１２の断面形状、及び
必要に応じて大径筒状部１６におけるゲート部の
位置が調節、設定されることとなるが、特に、か
かる樹脂材料注入口としてのゲート部も、通常、
他の部位に比して、強度が劣るために、ウエルド
ラインと同様、発生応力が最大となる最外側部位
を避け、周方向に所定距離だけずれた位置に設定
することが望ましい。なお、かかる第４図におい
ては、その理解を容易とするために、上記具体例
と同一の構造とされた部位に対して、それぞれ、
同一の符号を付しておくこととする。 By the way, when setting the gate part C in one cylindrical part, for example, the large-diameter cylindrical part 16, the position of the weld line that occurs in the other small-diameter cylindrical part 14 is, as described above, at the outermost part. The cross-sectional shape of the rod portion 12 and the position of the gate portion in the large-diameter cylindrical portion 16 are adjusted and set as necessary so that the resin material injection port deviates by a predetermined dimension. The gate part as well is usually
Since the strength is inferior to other parts, it is preferable to avoid the outermost part where the generated stress is maximum and to set it at a position shifted by a predetermined distance in the circumferential direction, similar to the weld line. In addition, in FIG. 4, in order to facilitate understanding, parts having the same structure as the above specific example are shown as follows.
The same reference numerals are given.
また、かかるゲート部：Ｃの具体的な位置とし
ては、第４図において、γが20度〜70度程度、好
ましくは30度〜60程度となるように、通常、45度
程度に設定されることとなる。 In addition, the specific position of the gate portion C is usually set at about 45 degrees, so that γ is about 20 degrees to 70 degrees, preferably about 30 degrees to 60 degrees, as shown in FIG. That will happen.
以上、本発明の実施例について詳述してきた
が、これらは文字通りの例示であつて、本発明
は、かかる具体例にのみ限定して解釈されるもの
ではない。 Although the embodiments of the present invention have been described in detail above, these are literal illustrations, and the present invention is not to be construed as being limited only to these specific examples.
例えば、前記実施例においては、そのロツド部
１２が、複数の補強リブ２０，２２，２４を有す
る略王字型断面形状をもつて形成されていたが、
その形状は限定されるものではなく、要求される
強度及び経済性等を考慮して適宜決定されるもの
であり、コ字型断面やＩ字型断面、或いは中実矩
形断面等の形状が、その軸直角方向断面を二つの
筒状部１４，１６の軸心を含む平面：ｘ−ｘにて
分断した際に生ずる二つの断面部分が互いに異な
る面積を与えるものである限り、何れも採用され
得るものである。 For example, in the embodiment described above, the rod portion 12 was formed to have a substantially king-shaped cross-sectional shape having a plurality of reinforcing ribs 20, 22, and 24.
The shape is not limited and is determined appropriately taking into consideration the required strength and economical efficiency, and shapes such as a U-shaped cross section, an I-shaped cross section, or a solid rectangular cross section, As long as the two cross-sectional parts created when the cross-section in the direction perpendicular to the axis is divided at x-x, which is a plane including the axes of the two cylindrical parts 14 and 16, have mutually different areas, either can be adopted. It's something you get.
また、前記第一の実施例においては、ロツド部
１２の成形キヤビテイにおける、その軸直角方向
断面を二つの筒状部１４，１６の成形キヤビテイ
の軸心を含む平面にて分断した際に生ずる二つの
断面部分のうち、断面積が大なる側に、ゲート部
が設けられていたが、それとは逆に、かかるゲー
ト部を、断面積が小なる側に設けることによつて
も、或いは二つの筒状部１４，１６の成形キヤビ
テイの軸心を含む平面上に設けることによつて
も、前記実施例と同様な効果が発揮され得るもの
である。 In addition, in the first embodiment, when the cross section of the molded cavity of the rod portion 12 in the direction perpendicular to its axis is divided by a plane containing the axes of the molded cavities of the two cylindrical portions 14 and 16, The gate part was provided on the side with the larger cross-sectional area among the two cross-sectional parts, but conversely, it is also possible to provide the gate part on the side with the smaller cross-sectional area, or to separate the two. Even by providing the cylindrical portions 14 and 16 on a plane that includes the axis of the molded cavity, the same effects as in the embodiment described above can be achieved.
さらに、前記実施例においては、二つの筒状部
１４，１６が、互いに異なる径寸法をもつて形成
されていたが、それらが同寸法のものであつて
も、本発明が良好に適用されることは勿論であ
る。 Further, in the above embodiment, the two cylindrical portions 14 and 16 were formed with different diameter dimensions, but the present invention can be applied satisfactorily even if they have the same diameter. Of course.
加えて、前記実施例においては、本発明を自動
車のバツフアーロツドの製造方法に対して適用し
たものの一例を示したが、本発明は、その他、サ
スペンシヨンにおける各種ロツドやリンク等の製
造方法に対しても、有効に適用され得るものであ
る。 In addition, in the above embodiment, an example was shown in which the present invention was applied to a method of manufacturing a buffer rod for an automobile, but the present invention can also be applied to a method of manufacturing various rods, links, etc. in suspensions. can also be effectively applied.
その他、一々列挙はしないが、本発明は当業者
の知識に基づいて種々なる変更、修正、改良等を
加えた態様において実施され得るものであり、ま
たそのような実施態様が、本発明の趣旨を逸脱し
ない限り、何れも本発明の範囲内に含まれるもの
であることは、言うまでもないところである。 Although not listed in detail, the present invention may be implemented in various modifications, modifications, improvements, etc. based on the knowledge of those skilled in the art, and such embodiments may be implemented without departing from the spirit of the present invention. It goes without saying that all of these are included within the scope of the present invention as long as they do not deviate from the above.
（発明の効果）
上述の説明から明らかなように、本発明方法に
従えば、強度低下の生じ易いウエルドラインを、
最大応力発生部位からずれた位置に、容易に設定
することができるのであり、しかも、かかるウエ
ルドラインの発生位置を調節することも可能とな
るのである。(Effects of the Invention) As is clear from the above explanation, according to the method of the present invention, weld lines where strength is likely to decrease can be removed.
The weld line can be easily set at a position offset from the area where the maximum stress occurs, and the position where the weld line is generated can also be adjusted.
それ故、本発明方法に従えば、得られる連結ロ
ツドにおいて、樹脂材料本来の設計強度が有効に
発揮され得ることとなり、以て、連結ロツドの樹
脂化が有利に達成され得ることとなるのである。 Therefore, according to the method of the present invention, the original design strength of the resin material can be effectively exhibited in the resulting connecting rod, and thus the connecting rod can be advantageously made of resin. .
第１図は本発明方法によつて製造された連結ロ
ツドの一具体例としてのバツフアーロツドを示す
平面図であり、第２図は第１図における−断
面図であり、第３図は第２図における−断面
図である。また、第４図は本発明方法に従つて製
造された連結ロツドの別の具体例としてのバツフ
アーロツドを示す、第１図に相当する平面図であ
る。
１０……バツフアーロツド、１２……ロツド
部、１４……小径筒状部、１６……大径筒状部。
FIG. 1 is a plan view showing a buffer rod as a specific example of a connecting rod manufactured by the method of the present invention, FIG. 2 is a cross-sectional view taken from FIG. 1, and FIG. FIG. Further, FIG. 4 is a plan view corresponding to FIG. 1, showing a buffer rod as another specific example of the connecting rod manufactured according to the method of the present invention. 10...Buffer rod, 12...Rod part, 14...Small diameter cylindrical part, 16...Large diameter cylindrical part.
Claims (1)
平行な軸心をもつて形成された二つの筒状部を一
体的に有し、それぞれの筒状部内に配されるゴム
ブツシユを介して、相互に連結されるべき所定の
取付部材にそれぞれ取り付けられることにより、
それらの取付部材を弾性的に連結せしめる連結ロ
ツドを、所定の樹脂材料の射出成形操作によつて
製造するに際して、 前記ロツド部の成形キヤビテイを、その長手方
向両端部に設けられる前記二つの筒状部の成形キ
ヤビテイにおける両軸心を含む平面を挟んで両側
に位置する部分が相互に異なる面積を与える軸直
角方向の断面形状をもつて形成し、前記樹脂材料
を、かかるロツド部の成形キヤビテイを通じて、
前記筒状部の成形キヤビテイに導くことにより、
該筒状部に形成されるウエルドラインを、該筒状
部の最外側位置から周方向にずらせることを特徴
とする樹脂製連結ロツドの製造方法。[Scope of Claims] 1. Two cylindrical parts integrally formed with substantially parallel axes at both axial ends of the longitudinal rod part, and disposed within each cylindrical part. By being respectively attached to predetermined mounting members to be interconnected via rubber bushings,
When manufacturing a connecting rod that elastically connects these mounting members by injection molding of a predetermined resin material, a molded cavity of the rod portion is formed by forming a molded cavity between the two cylindrical rods provided at both ends in the longitudinal direction. The resin material is passed through the molding cavity of the rod part, and the resin material is passed through the molding cavity of the rod part. ,
by guiding it into the molding cavity of the cylindrical part,
A method for manufacturing a resin connecting rod, characterized in that a weld line formed on the cylindrical portion is shifted in the circumferential direction from an outermost position of the cylindrical portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28274087A JPH01126413A (en) | 1987-11-09 | 1987-11-09 | Connecting rod made of resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28274087A JPH01126413A (en) | 1987-11-09 | 1987-11-09 | Connecting rod made of resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01126413A JPH01126413A (en) | 1989-05-18 |
| JPH0514806B2 true JPH0514806B2 (en) | 1993-02-26 |
Family
ID=17656431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28274087A Granted JPH01126413A (en) | 1987-11-09 | 1987-11-09 | Connecting rod made of resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01126413A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7350778B2 (en) | 2004-03-19 | 2008-04-01 | Tokai Rubber Industries, Ltd. | Torque rod |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10299805A (en) * | 1997-04-21 | 1998-11-13 | Bridgestone Corp | Coupling device |
| JP4436103B2 (en) * | 2003-10-03 | 2010-03-24 | 株式会社ブリヂストン | Torque rod structure |
| JP4607938B2 (en) * | 2007-11-01 | 2011-01-05 | 東洋ゴム工業株式会社 | Anti-vibration connecting rod |
| JP4933476B2 (en) * | 2008-04-18 | 2012-05-16 | 日本発條株式会社 | Ball joint |
| JP2011083986A (en) * | 2009-10-16 | 2011-04-28 | Kojima Press Industry Co Ltd | Resin component for vehicle and injection molding die for the same |
| JP5468644B2 (en) * | 2012-06-15 | 2014-04-09 | 日本発條株式会社 | Stabillink |
| JP5916552B2 (en) * | 2012-07-26 | 2016-05-11 | 住友理工株式会社 | Anti-vibration connecting rod and manufacturing method thereof |
| JP6189672B2 (en) * | 2013-08-14 | 2017-08-30 | 山下ゴム株式会社 | Resin torque rod |
| JP6562764B2 (en) * | 2015-08-10 | 2019-08-21 | 株式会社ブリヂストン | Anti-vibration member and method for manufacturing anti-vibration member |
| JP6943796B2 (en) * | 2018-03-19 | 2021-10-06 | フタバ産業株式会社 | Suspension arm and suspension arm manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188712A (en) * | 1982-04-30 | 1983-11-04 | Nissan Motor Co Ltd | Car link and its manufacturing method |
| JPS59246U (en) * | 1982-06-24 | 1984-01-05 | 株式会社東芝 | cathode structure |
| EP0176934A1 (en) * | 1984-10-04 | 1986-04-09 | INDUSTRIE PIRELLI S.p.A. | Anchoring connecting rod in an engine suspension |
| JPS61287807A (en) * | 1985-06-14 | 1986-12-18 | Tokai Rubber Ind Ltd | Structure of suspension bush assembly used in suspension mechanism for vehicle |
| JPS628805A (en) * | 1985-07-04 | 1987-01-16 | Tokai Rubber Ind Ltd | Suspension bushing assembly in vehicle suspension mechanism and its manufacture |
| JPS62104717A (en) * | 1985-10-31 | 1987-05-15 | Tokai Rubber Ind Ltd | Preparation of plastic rod with rubber bushing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS503217U (en) * | 1973-05-15 | 1975-01-14 |
-
1987
- 1987-11-09 JP JP28274087A patent/JPH01126413A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188712A (en) * | 1982-04-30 | 1983-11-04 | Nissan Motor Co Ltd | Car link and its manufacturing method |
| JPS59246U (en) * | 1982-06-24 | 1984-01-05 | 株式会社東芝 | cathode structure |
| EP0176934A1 (en) * | 1984-10-04 | 1986-04-09 | INDUSTRIE PIRELLI S.p.A. | Anchoring connecting rod in an engine suspension |
| JPS61287807A (en) * | 1985-06-14 | 1986-12-18 | Tokai Rubber Ind Ltd | Structure of suspension bush assembly used in suspension mechanism for vehicle |
| JPS628805A (en) * | 1985-07-04 | 1987-01-16 | Tokai Rubber Ind Ltd | Suspension bushing assembly in vehicle suspension mechanism and its manufacture |
| JPS62104717A (en) * | 1985-10-31 | 1987-05-15 | Tokai Rubber Ind Ltd | Preparation of plastic rod with rubber bushing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7350778B2 (en) | 2004-03-19 | 2008-04-01 | Tokai Rubber Industries, Ltd. | Torque rod |
| CN100381298C (en) * | 2004-03-19 | 2008-04-16 | 东海橡胶工业株式会社 | Torque rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01126413A (en) | 1989-05-18 |
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